<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<p>要被赋值的内容</p>
	</body>
</html>
<script>
	     document.onkeydown = function(e){
	     	if(e.ctrlKey && (e.keyCode == 86 || e.keyCode == 67))
	     	{
	     		return false;
	     	}
	     	window.alert('你要复制什么?crtl+c');
	     }
</script>
